Perhaps it is close to the time when we realise 50 years of underfunding of infrastructure, health and education in the UK means our country is approaching third-world status with no money to do anything about it.
Perhaps then we might accept that a submarine-launched independent nuclear detterent is a luxury we simply can't afford and a simpler and cheaper option (land-based missiles like N Korea????) would free up billions of public money to mend the country and stop the Corbinistas from promising things we can't presently afford.
Good luck with proving that one. Assuming you can find an OTS system and assuming Tarquin and Jemima can be persuaded to have some nasty missiles next door making them a target.
Incidentally, even the headcases at CND think that the whole-life cost of the submarine deterrent will be about £100Bn. Spread that over 40 years and you get £2.5Bn a year - simple cash numbers. Bias it a bit towards procurement (lets say £5bn pa over the first ten years) and £1.5Bn pa when in service.
That £5Bn pa is only 10% of the debt interest payment we make every year. Compare that with the £12Bn pa we spend on foreign aid, or the £130Bn pa we spend just on NHS, or the £100Bn pa we spend on edumacation, or the £250Bn pa we spend on welfare (mainly pensions).
Trident (and the carriers/F35) and Typhoon/FSTA etc are all a drop in the ocean compared to where the real money goes in this country.